Ca/Co co-doped LaAlO₃ ceramic

emissivity 0.95

Environmentally friendly perovskite infrared radiation material that replaces toxic Cr doping with Ca/Co co-doping for high emissivity across a wide spectral range, intended for energy saving in high-temperature industry.

Wang, Qinghu · Yangxi, Liu · Guoping, Wei · Huang, Liang · Wang, Xueqing · Sang, Shaobai · Xu, Yibiao · Liang, Xiong · Yawei, Li · Li, Jiangtao · Volkova, Olena · Ewais, Emad Mohamed Mohamed · Hui, Yang

Chemical Engineering Journal 2026

Specifications

Average emissivity (0.76–2.5 μm)

{'zh': '0.90', 'en': '0.90'}

Average emissivity (2.5–14 μm)

{'zh': '0.95', 'en': '0.95'}

Surface temperature increase

{'zh': '243.7', 'en': '243.7'} °C

Energy-saving efficiency

{'zh': '13.8', 'en': '13.8'} %

Advantages

Environmentally friendly

Ca²⁺/Co²⁺ co-doping replaces Cr, avoiding toxic Cr⁶⁺ formation and eliminating environmental and health risks.

Broadband high emissivity

Enhanced free carrier absorption, impurity level absorption, and lattice vibration absorption lead to high emissivity across 0.76–14 μm.

Significant energy saving

The coating greatly increases porous burner surface temperature, achieving 13.8% energy-saving efficiency during water heating.

Applications

• high-temperature industrial energy saving：Coat kiln linings to reduce heat dissipation and exhaust losses
• infrared radiation materials：Replace Cr-containing IR materials to eliminate Cr⁶⁺ toxicity
• porous burners：Increase burner surface temperature for better radiant heat transfer